College of Forestry

Watershed Processes Group

Geomorphology Round Table Seminar Series

Geomorphology Brown Bag - Fall 2005
Thursday 12-1PM in ALS 3006
Landscape Evolution

Landscape evolution models are generally driven by erosion from water flowing over the land’s surface, due to an energy gradient inherited from (and resulting in) topography. Young volcanic terranes are typically characterized by extensive lava fields having some topographic relief but little or no fluvial dissection. In these landscapes, development of drainage networks is fundamentally limited by the very high permeability of the rocks, resulting in virtually all precipitation infiltrating the surface and contributing to deep groundwater. In the absence of surface runoff, drainage networks develop extremely slowly and by different suites of processes than in landscapes where surface and shallow sub-surface flow prevail. Mechanisms and rates associated with these weathering processes are poorly understood, and likely to vary by climatic and geomorphic setting.

This quarter we will explore the development of drainage networks on porous lava flows, drawing from examples in the Oregon Cascades, Jordan, Libya, Hawaii, the Galapagos and other areas we would like to go on field trips.

email Sarah to get on our weekly reminder list - please recruit new students!

Presenter: NO MEETING
Presenter: Anne Jefferson

Introduction to the landscapes of the Oregon Cascades

Presenter: Stephen Lancaster, FSL West Conference Room

Landscape Evolution Theory and Modeling in Geomorphology

Presenter: Jay Noller

"Subsurface Slime Shapes Streams"

Presenter: Group

T.J. Battin, D. Sengschmitt (1999). Linking Sediment Biofilms, Hydrodynamics, and River Bed Clogging: Evidence from a Large River. Microb Ecol 37:185–196.

Presenter: Group

Experimental Design for biofilm growth/drainage network development in flume

Presenter: <strong>Saturday Field Trip</strong>

Collect soil, lichen, rocks, etc at McKenzie Pass

Presenter: Group

Look at the rocks

Presenter: Group


Presenter: NO MEETING